Spring-grip dumb-bell and exerciser.



U. MALVISI.

SPRING GRIP DUMBBBLL AND BXERCISER..

APPLIUATION FILED MAY 13, 1912.

PatentedMar. 2, 1915.

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UGO MALVISI, 0F TURIN, ITALY.

SPRING-GRIP DUIVIB-ELL AND EXERCISER.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed May 13, 1912. Serial No. 697,017.

To all 'whom it may concern:

Be it known that I, UGO MALvIsI, manufacturer, a subject of the King of Italy, residing at 10 Via Burdin, Turin, Italy, have invented certain new and useful Imrovements in Spring-Grip Dumb-Bells and xercisers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which is appertains to make and yuse the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to dumb-bells of the spring grip type, and has for object improved dumb-bells of this type in which the springs may be much smaller than those of present spring grip dumb-bells while offering a wider range of resistances to pressing together the halves of the dumb-bell.

The invention consists in an improved spring grip dumb-bell the main feature of p which is that the springs are of the volute type and preferably biconical.

embodiment of the invention is illustrated by way of example in the accompanying drawing, showing a dumb-bell in longitudinal section.

In accordance with the invention the springs 1 are of volute and biconical form, made in known manner from a strip of steel of suitable shape coiled in a helix. These springs are arranged transversely and in any suitable number between the two halves 2, 3 of the dumb-bell and accommodated in easily exchangeable manner in the desired position by means of pins l arranged in opposite pairs projecting from the inner faces of the dumb-bell halves, the ends of the volute springs fitting over these pins. This method of mounting the springs l has the advantage of allowing the springs to be easily removed or interchanged for the purpose of varying the resistance to the grip of the dumb-bell, but any other suitable method of mounting the springs may be adopted.

In the embodiment of the invention illustrated in the figure, the two dumb-bell halves are of C-shape and arranged capable are provided with external facings 2 3 of wood or other material attached by suitable y screws 2 3".

In the foregoing description and in the embodiment of the invention illustrated in the drawing, biconical volute springs have been assumed, these being preferable in this kind of application. It should be observed however that simple conical volute springsV may be used.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. A spring grip dumb-bell, having a right hand and a left hand shell, said shells interengaging with each other and being provided with a plurality of oppositely situated pins, a plurality of volute springs between said shells held in position by said pins.

2. A spring grip dumb-bell, having a right hand and a left hand shell, said shells interengaging with each other and being provided with a plurality of oppositely situated pins, a plurality of volute springs between said shells held in position by said pins, said springs being of bi-conical shape with their smaller ends engaging said pins.

8. A spring grip dumb-bell, having a right hand and a left hand shell, said shells interengaging with each other and being provided with a plurality of oppositely situated pins, a plurality of volute springs between said shells held in position by said pins, said springs being of bi-conical shape with their smaller ends engaging said pins, an external cover for each shell shaped to provide a comfortable grip.

The foregoing specification signed at Turin (Italy) this 2nd day of May, 1912. UGO MALVISI.

In presence of two witnesses:

PIERO GIANOLIO, JooELrN SOUBEYRAN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, I). C. 

